Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee Gearbox Assembly
Model Number: 14-29-2904
The Milwaukee 14-29-2904 is a genuine OEM Gearbox Assembly for the 2904-20 M18 FUEL 1/2 in. Hammer Drill/Driver. The gearbox, or gearcase, is the heart of the tool's drivetrain: it houses the geartrain that transfers the motor's rotation to the chuck, the speed selection that sets the drill's speed ranges, the clutch that limits torque in drill and drive modes, and, on this hammer drill, the hammer mechanism that adds the percussion action for masonry drilling. Milwaukee supplies the gearbox as a complete service assembly so all of its internal gears, shafts, bearings, and mechanisms are factory-matched and installed as a unit, which restores the full drive, speed, clutch, and hammer function of the tool in one part rather than requiring the individual internal components to be sourced and assembled separately. A gearbox that has worn, stripped a gear, lost its clutch or speed function, or been damaged by a hard stall can leave the tool underpowered, noisy, stuck in one speed, or unable to drive the chuck. Installing the correct genuine Milwaukee OEM gearbox assembly returns the tool to full performance built to factory specification.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before placing your order, since running production changes can alter part compatibility within the same catalog number. This gearbox assembly is specified for the 2904-20 M18 FUEL 1/2 in. Hammer Drill/Driver, so confirm your tool's catalog and serial number against the parts diagram before ordering. The chuck, motor or rotor, electronics, housing, and mounting hardware are separate service items that vary by tool and transfer from your existing tool or are ordered individually, so refer to your tool's parts diagram for the correct companion part numbers and quantities. Because replacing the gearbox involves opening the tool and correctly interfacing the gearcase with the motor, chuck, and housing, follow the correct service procedure and use the Milwaukee-specified grease on reassembly where the diagram calls for it.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Gearbox Assembly for the 2904-20 M18 FUEL 1/2 in. Hammer Drill/Driver
- Complete gearcase that transfers the motor's output to the chuck
- Houses the geartrain, speed selection, clutch, and hammer mechanism
- Supplied as a complete assembly with its internal components installed
- Internal gears, shafts, and bearings factory-matched for direct installation
- Restores full drive, speed, clutch, and hammer function in one part
- Corrects a worn, stripped, or damaged gearbox after a hard stall or wear
- Manufactured to Milwaukee specification for correct fit and performance
- Direct-fit replacement requiring no modification
- Chuck, motor, electronics, and housing are separate parts, sold separately
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 14-29-2904
- Official Description: Gearbox Assembly
- Component Type: Gearcase and drivetrain service assembly
- Includes: Geartrain, speed selection, clutch, and hammer mechanism
- Primary Fitment: 2904-20 M18 FUEL 1/2 in. Hammer Drill/Driver
- Also Referenced On: Verify additional applications using Milwaukee's online parts lookup
- Parts Diagram Position: Verify the figure and bulletin number on Milwaukee's online parts lookup
- Quantity: Sold individually, (1) required per tool
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 14-29-2904 Gearbox Assembly, supplied as a complete assembly
The chuck, motor or rotor, electronics, housing, mounting hardware, and grease are NOT included, vary by tool, and are sold separately - refer to your tool's parts diagram for the correct part numbers and quantities. Always verify by serial number using Milwaukee's online parts lookup before ordering.
